If you need help or have some specific questions, email codefororlando@gmail.com.
GitHub Issues works just like any other commenting system on the Internet.
First, you'll need to create an account.
Then you have two options: (1) comment on an existing idea (a.k.a. "issue"), or (2) create a new idea.
If you see an idea that you're interested in, click on it, read the discussion and then add your thoughts to the bottom of the discussion thread. If you don't see the idea you have in mind, add a new one. Someone from the Code for Orlando staff will respond with some questions or feedback.
Here's a quick video intro on using Github Issues for discussion.
Finalist projects will be announced on May 28th . All registered National Day of Civic Hacking participants will receive the announced projects and challenges. Additionally, at the event on Saturday, June 4th, all projects will be listed on a white board incase anyone has missed it.
Thanks to ATX Austin's Code for America Brigade for creating this wonderful tool.